[test] Added new template with combobox

i added jquery combobox, for testing first as extra template.
Its a combination of selectbox with autocomplete.
-> You can search, like autocomplete
-> You can use keyboard to select
-> You can use mouse to select
-> Accept only values labels form selectbox (value is set in background)

You can find fast a web, type 4-5 letters and press down enter and its shown.